Brake-shoe mounting.



11 4485631 PATENTED APR. 2, 1907.

' VAN BURBN'LAMB.

BRAKE SHOE MOUNTING.

APPLICATION FILED MAY 19,1906.

' 2 SHBETS-SHEET 1.

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PATENTED APB. 2,1901.

' VAN BUREN LAMB.

BRAKE SHOE MOUNTING.

APPLIOAIION II'LED MAY 19. 1906.

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i INYENTKM WITNESSES.-

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0 but be firmly locked in position.

UNITED STATES PATENT OFFICE.

VAN BUREN LAMB, OF NEw HAVEN, CONNECTICUT, ASSIGNOR To KEYSTONE BRAKESHOE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

BRAKE-SHOE MOUNTING.

Specification of Letters Patent.

Patented April 2, 1907.

Application filed May 19,1906. Fcrial No. 317,708.

Brake-Shoe Mountings, of which the following I is a full, clear, andexact-description, such as will enable others skilled in the art towhich it appertains to make and use the same.

This invention relates to brake construc- .tion.

Among the objects thereof are the provision of a construction of and amounting for brake-shoes of simple and durable form and highly-efficientaction.

Another object is to provide means of the above type in which the metalis economically consumed and accidental dropping of the parts prevented.

Other objects will be in part obvious and in part pointed outhereinafter.

The invention accordingly consists in the features of construction,combinations of elements, and arrangement of parts, which Will beexemplified in the embodiment thereof hereinafter described and thescope of the application of which will be lowing claims.

In the accompanying drawings, wherein is shown one of the variouspossible embodiments of my invention, Figure 1 is a side elevationthereof in assembled condition. Fig. 2 is a similar view of a detachedshoe. is a rear view of the same. Fig. 4 is a sectional elevationshowing the relation of the parts one to another, the same being takensubstantially on the line at a; of Fig. 1. Fig. 5 is a perspective viewof a portion of a brakehead. Fig. 6 is a similar view of a shoe and aportion of a head in assembled relation.

Similar reference characters refer to similar parts throughout theseveral views of the drawings.

This invention will be, the more readily grasped if the following factsare borne in mind: It is a feature of prime importance in constructionsof the nature of those with which this invention deals that the parts benot only strong and durable in themselves, If the parts becomeaccidentally detached, not only is the indicated in the fol-- Fig. 3

braking power of the car correspondingly decreased, which may become afactor of great importance in emergencies, but the falling parts arelikely to clog switches and even in some instances cause derailment. Ihave found that for this secure interlocking bolts, keys, and even lugsare not in themselves thoroughly dependable, and in order to attain thebest results I cause an interfitting of the shoes themselves. In thepeculiar shaping and disposition of the parts whereby this interfittingis efliciently brought about he certain dominant features of the presentinvention. It may also be noted at this point that the consumption ofmetal in modern railroad-brakes is considerable, due not only to thewearing away of the parts by which the braking action is brought about,but the scraping of partially-worn members, which are rendered uselessin former ineiiicient constructions. The material lessening of thiswaste of metal forms one of the aims of this invention. The above andother advantageous features are attained in constructions of the natureof that hereinafter described.

Referring now to Fig. 1 of the accompanying drawings, there is shown abrake-shoe 1, comprising the parts 2 and 3, divided transversely of theshoe, preferably at a point off the center thereof. The face of thisshoe is provided with a recess or mortise, which is of a generaldovetail form and the walls 4 of which converge in a longitudinaldirection toward each end of the shoe. The depth of this recessdecreases, moreover, toward the ends of the shoe. I/Vithin this mortiseis secured a shoe 5, (shown in dotted lines,) preferably of aconstruction substantially identical with that of shoe 1 and providedwith a tenon fitting the above-described recess. Shoe 5 is preferablydivided, as shown at 6, at a point staggered or offset with reference tothe transverse dividing-line of shoe 1, so as to strengthen theconstruction of the parts in assembled condition and add to the generalefficiency of the brake. surface of the parts 2 and 3 of the shoe-1 areformed dovetail tenons, and as these tenons form, with the parts inassembled condition, a single projection substantially identical Uponthe rear IOO I of the tenon.

with that above described with reference to shoe 5 they will be hereinso considered and are referred to by the reference-numeral 6.

The brake-head 7 comprises a part 8, preferably cast integral, whichfits one end of the tenon 6, as shown in Fig. 6 of the drawings, andextends along one side of the other end of the tenon fitting beneath theundercut lateral walls thereof. The last-described portion of the headis provided with a shoulder 9 and a projection 10, which extends overand is spaced from the rear surface of the tenon. This projection isprovided with a keyway 11 substantially registering with a keyway 12,formed within the flange 13, by which the head is mounted upon thebrake-beam as through bolt-holes 14. The complementary portion of thehead 15 (shownin Fig. 5 of the drawings) comprises a base 16, adapted toextend over the rear face of the tenon 6, as shown in Fig. 4 of thedrawings, and fit beneath the projecting portion 10. This base is cutaway, as shown at 17, so as to pro vide a recess which is substantiallyof dovetail formation and with the parts in assembled condition fitsabout the outer surface Projections 18 and 19, spaced one from another,as shown in Fig. 5 of the drawings, are also provided upon the portion15 and intermesh with the projection 10, the parts being beveled, asshown at 20 in the drawings, in order to resist any tendency of the shoeto draw this portion away from the main portion of the head. Projections18 and 19 are provided with keyways 21, registering with the ways 1.1and 12 above described and adapted with the parts assembled to permitthe passage of a key 22 therethrough, thus securely locking the partstogether. This locking action, moreover, is enhanced by the dispositionof a web 23, formed upon the part 15, which takes under a projectingshoulder 24 upon the flange 13.

The method of use of the above-described embodiment of my invention issubstantially as follows: Assuming that the shoe is worn to apoint nearthe head, the parts are detached by withdrawing the key 22, whereuponthe part 15 of the head may be removed in alateral direction, and thusrelease the part 2 of the shoe. The part 3 of the shoe is then drawnfrom the main portion of the head. The new shoe is then mounted aboutthe worn portion which has just been removed by sliding the parts in alongitudinal direction over each end of the tenon formed thereon, thuspositioning the worn shoe in the position shown in the dotted lines ofFig. 1 of the drawings, and the head is slid over one end of the tenonupon the rear surface of the new shoe. The part 15 is then forced in alateral direction toward the opposite portion of the head and theprojection 10 with its outwardly-tapered walls fits between theprojections 18 and 19,

'as above described, and is secured in place, as

by the key.

It will thus be seen that I have provided a construction in which theseveral objects of my invention are fulfilled. The parts are so disposedas to interfit one with another and are held in place by a single key.It will be seen, moreover, that no direct stress is brought to bear uponthis key, as it is called upon to resist merely the tendency of the part15 to spring out in a lateral direction, and no material force isbrought to bear to tend to cause such springing movement. The parts arereadily assembled without the use of special tools and are of suchsimple construction as to permit them to be readily interchangeable. Itwill also be seen that the entire shoe may be worn away, thus consumingall of the metal and doing away with the chance of dropping parts uponthe road-bed with the results above indicated. The entire constructionis of the simplest and cheapest type, moreover, and is well adapted towithstand the somewhat severe conditions of practical use.

As many changes could be made in the above construction and manyapparently widely different embodiments of my invention could be madewithout departing from the scope thereof, I intend that all mattercontained in the above description or shown in the accompanying drawingsshall be interpreted as illustrative and not in a limiting sense.

I desire it also to be understood that the language used in thefollowing claims is intended to cover all of the generic and specificfeatures of the invention herein described and all statements of thescope of the invention which as a matter of language might be said tofall therebetween.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is

1. In construction of the class described, in combination, a brake-shoedivided transversely into two parts, a divided brake-head engaging theshoe and holding the p arts thereof in assembled relation, and meansadapted to hold together the parts of said head.

2. In construction of the class described, in combination, a brake-shoedivided transversely into two parts and provided upon its rear surfacewith a laterallyumlercut projection, a divided brake-head adapted to fitabout said projection and hold the parts 'of said shoe in assembledcondition, and means adapted to hold together the parts of said head.

3. In construction of the class described, in combination, a brakeshoedivided transversely into two p arts and provided upon its rear surfacewith a laterally-undercut projection tapering toward each end of theshoe,

a divided brake-head adapted to fit about said projection and hold theparts of said shoe in assembled condition, and means adapted to holdtogether the parts of said shoe.

4. In construction of the class described, in combination, a brake-shoedivided transversely into two parts, a divided brake-head engaging theshoe and holding the parts thereof. in assembled relation, and meansadapted to hold together the parts of said head, the line of division ofsaid bral ehead being offset with respect to the line of division ofsaid brake-shoe.

5. In construction of the class described, in combination, a brake-shoedivided transversely into two parts and provided upon its rear surfacewith a laterally-undercut pro jection, a divided brake-head adapted tofit about said projection and hold the parts of said shoe in assembledcondition, and means adapted to hold together the parts of said head,the line of division of said brake-head being offset with respect to theline of division of said brake-shoe.

6. In construction of the class described, in combination, a brake-shoedivided transversely into two parts, a second brake-shoe adapted toengage and hold together the parts of said first brake-shoe, said secondshoe being divided transversely into two parts, a divided hea'd engagingsaid second shoe and holding the parts thereof in assembled relation,and means adapted to hold together the parts of the head.

7. In construction of the class described, in combination, a brake-shoedivided trans versely into two parts, a second brake-shoe adapted toengage and hold together the parts of said first brake-shoe, said secondshoe being divided transversely into two parts, a divided head engagingsaid second shoe and holding the parts thereof in assembled relation,and means adapted to hold together the parts of the head, the lines ofdivision of said two shoes being offset with respect one to another.

8. In construction of the class described, in combination, a brake-shoedivided transversely into two parts, a second brake-shoe engaging andinterfitting with the rear of said first shoe and divided transverselyinto two parts on a line offset with respect to the line of division ofsaid first shoe, and means adapted to hold together the portions of saidsecond shoe.

9. I11 construction of the class described, in combination, a brake-shoedivided transversely into two parts, a second brake-shoe engaging andinterfitting. with the rear of said first shoe and divided transverselyinto two parts on a line offset with respect to the line of division ofsaid first shoe, said second shoe being formed with a projecting tenonhaving undercut lateral walls, a divided head,

. the parts of which fit about said tenon, and

means adapted to hold together the parts of said head.

10. I11 construction of the class described, in combination, abrake-shoe divided transversely into two parts, a second brake-shoeengaging and interfitting with the rear of said first shoe and dividedtransversely into two parts 011 a line offset with respect to the lineof division of said first shoe, said second shoe being formed with aprojecting tenon having undercut lateral walls, a divided head, theparts of which fit about said tenon, and means adapted to hold togetherthe parts of said head, said first and second shoes beinginterchangeable one with another.

11. In construction of the class described, in combination, a brake-shoeprovided with a projecting .tenon, the lateral surfaces of which areundercut, a divided head one end of which fits about one portion of saidtenon and the other end of which comprises laterally-separable parts,and means adapted to hold said parts together.

12. In construction of the class described, in combination, a brake-shoeprovided with a projecting tenon, the lateral surfaces of which areundercut, a divided head one end of which fits about one portion of saidtenon and the other end of which comprises laterally-separable parts,said parts of said head being provided with laterally-extendingprojections intermeshing one with another, and means adapted to holdsaid parts together.

13. In construction of the class described,

.in combination, a brake-shoe provided with a projecting tenon thelateral surfaces of which are undercut, a divided head one end of whichfits about one portion of said tenon and the other end of whichcomprises laterally-separable parts, said parts being provided withlaterally-extending projections adapted to intermesh one with anotherand having keyways formed therein registering one with another with theparts in assembled relation, and a key passing through said keyways andholding said parts together.

14. In construction of the class described, in combination, a pair ofsubstantially interchangeable shoe members each of which is providedupon its rear surface with a projection having undercut lateral wallsand upon its front surface with a recess adapted to'fit a similarprojection whereby each shoe member is adapted to be mounted upon theother, each shoe member being transversely divided and the lines ofdivision being offset with respect one to another with the parts inassembled condition.

15. In construction of the class described, in combination, a brake-shoeprovided with a projecting tenon having its lateral surfaces undercut, abrake-head provided with laterally-separable parts adapted to fit aboutsaid tenon, said parts having projecting portions intermeshing one withanother with the parts in assembled condition and provided with keyways,and a key passing through said keyways and locking said parts inassembled relation.

16. In construction of the class described, in combination, a brake-shoeprovided with a projecting tenon having its lateral surfaces undercut, abrake-head comprising laterallyseparable parts adapted to fit about saidtenon, one of said parts being provided with a projection the walls ofwhich converge in a direction away from the shoe and the other of saidparts being provided with a pair of projections adapted to fitabout saidfirstmentioned projection, and a key passing through keyways formed insaid projections and locking said parts in assembled relation.

17. In construction of the class described, in combination, a brake-shoeprovided with a projecting tenon having its lateral surfaces undercut, adivided head one end of which fits about one portion of said tenon andthe other end of which comprises laterally-separable parts, intermeshingprojections formed upon said parts and provided with converging walls, ashoulder formed upon said head under which one separable part is adaptedto rest, and a key passing through said head and holding the parts inassembled relation.

18. In construction of the class described, in combination, a brake-shoeprovided with a projecting tenon having its lateral surfaces undercut, adivided head one end of which fits about one portion of said tenon andthe other end of which comprises laterally-separable parts, intermeshingprojections formed respectively upon said parts and provided withconverging walls, a shoulder upon said head upon which the projectionfrom one separable part rests, a shoulder upon said separable part uponwhich the projection from said head rests, and a key passing throughsaid head and holding the parts in assembled condition.

19. In construction of the class described, in combination, a brake-shoeprovided with a projecting tenon having its lateral surfaces undercutand tapering toward the ends of the shoe, a divided head one end ofwhich fits about one portion of said tenon and the other end of whichcomprises laterally-separable parts, intermeshing projections formedupon said parts and provided with converging walls, a shoulder formedupon said head under which one separable part is adapted to rest, and akey passing through said head and holding the parts in assembledrelation.

20. In construction of the class described, in combination, a shoedivided transversely into two parts, a divided brake-head fitting aboutone end of said shoe and having at its other end a laterally separableportion adapted to fit about the other end of the shoe, and meansadapted to hold the parts of said head together.

21. In construction of the class described, in'combination, a shoedivided transversely into two parts and provided upon its rear surfacewith a tenon having its lateral walls un dercut, a brake-head havinglaterally-separable portions provided with laterally-extendingprojections adapted to intermesh upon said portions being fitted aboutsaid tenon, and means adapted to hold the portions of said head inassembled relation.

22. In construction of the class described, in combination, a shoedivided transversely into two parts and provided upon its rear surfacewith a tenon having its lateral walls undercut, a head havinglaterallyseparable parts adapted to fit about said tenon, each of saidparts being provided with a laterally-extending projection adapted torest against the other with said parts in assembled condition, and a keyadapted to pass through a keyway formed in said portions.

In construction of the class described, in combination, a brake-shoedivided transversely into two parts and provided upon its rear surfacewith a tenon having its lateral walls undercut, a second brake-shoedivided into two parts and fitted about said tenon and provided with asimilar tenon upon its rear surface, a divided head fitted about one endof the tenon upon said second shoe and provided with alaterally-separable portion adapted to fit about the other end thereof,and means adapted to hold said portions of said head in assembledcondition.

24. In construction of the class described, in combination, a brake-shoedivided transversely into two parts and provided upon its rear surfacewith a tenon having its lateral walls undercut, a second brake shoedivided into two parts and fitted aboutsaid tenon and provided with asimilar tenon upon its rear surface, a divided head fitted about one endof the tenon upon said second shoe and provided with alaterally-separable portion adapted to fit about the other end thereof,a projection formed upon the main portion of said head, a projectionformed upon the separable portion of said head and adapted to restagainst said first projection, and a key adapted to pass through saidprojections and lock the same in assembled relation.

25. In construction of the class described, in combination, a brake-shoedivided transversely into two parts and provided upon its rear surfacewith a tenon having its lateral walls undercut, a second brake-shoedivided into two parts and fitted about said tenon and provided with asimilar tenon upon its rear surface, a divided head fitted about one endof the tenon upon said second shoe and provided With alaterally-separable portion of division of said two shoes being offsetwith adapted to fit about the other end thereof, a respect one toanother. so projection formed upon the main portion of In testimonywhereof I afiix my signature said head, a projection formed upon saidsepin the presence of tWo Witnesses.

arable portion of said head and adapted to VAN BUREN LAMB. rest againstsaid first projection, and a key WVitnesses: adapted to pass throughsaid projections and R. S. BLAIR,

lock the same in assembled relation, the lines ARTHUR G. PREVIN.

